The art is really cute! I wish there was a bit more to do in the game, though. But what’s there is good.
One thing I don’t like is that the game opens your browser to play sound effects. The sound effects should be included in the game itself. I understand that it may be meant as a bit of a gag, but the game is nevertheless overstepping its bounds there. Part of the usual expectations when playing a game is that the game doesn’t mess with your computer, and breaking that contract just for comedic effect is somewhat upsetting.
(As a side note, it doesn’t even work in my case because I use Firefox which blocks autoplay by default. So you’re relying on browser configuration for this feature to work in the first place, which means that it’ll break where people’s browsers are not configured the way you want them to be. This is another reason to keep SFX inside the game.)